The sheriff's department said late Thursday that the attacks were first reported June 16 and continued through Tuesday.

The department, which patrols transit lines, says the assaults were reported at different times of the day.

Authorities say the suspect is described as Latino and between 21 and 25 years old. He is about 6 feet tall, weighs about 195 pounds and has short black hair and brown eyes. He also has a tattoo on his right bicep.